In comics, while Bucky has taken on the mantle of Captain America at certain points, it's not a permanent or default status. Steve Rogers is the original and most commonly associated Captain America.
Sure, Bucky has been Captain America in the comic universe. This happened after specific storylines and events that led to the passing of the mantle or under special circumstances.
A fanfiction could focus on an alternate universe where Bucky becomes Captain America instead. He has to deal with the same ideals but in his own unique way, while also having to face Steve Rogers in a different role, perhaps as an advisor or a reluctant ally. This would create a lot of interesting character dynamics.
In the comics, Bucky didn't become Captain America. Captain America has mainly been associated with Steve Rogers. However, Bucky has had significant storylines and developments of his own.
One common theme is loyalty. Their loyalty to each other is often a central part of the stories. They've been through so much together and would do anything for one another.
In certain comic arcs, Bucky Barnes takes on the mantle of Captain America. This occurs after specific events and developments that shape the storyline.
Well, it depends on the specific comic series and story arcs. In some cases, Bucky Barnes does become Captain America after certain events and circumstances unfold.
Bucky has become the new Captain America in the comic. This transformation often brings new dynamics and challenges to the story, as Bucky navigates the responsibilities and expectations that come with the mantle.